Draining Air Tanks; Shrader Valve - Blue Bird TC/2000 Owner's Manual

PARKING
Use the dash mounted valve to apply the rear spring brake when parking the coach.
When the parking brake is applied, and the ignition switch is ON, a dash-mounted yel-
low light labelled PARK will warn the driver that the brake is applied.
CAUTION: Do not attempt to move bus before spring brakes are released.

DRAINING AIR TANKS

Condensation must be drained from all air tanks daily. To drain tanks properly, leave cocks open until all
air escapes and draining stops. NOTE: Daily draining is not required on units equipped with automatic drain
valve or an air dryer. The air dryer removes water, oil and other contaminants before they reach the wet tank.
The automatic drain valve contains a reservoir to collect condensation in the air brake system which ejects
during the on-off cycle of the compressor. On valves with heating elements, freeze up protection is opera-
tional when the ignition is turned on.

SHRADER VALVE

The coach is equipped with a Schrader valve which is located at
the end of the wet tank. It allows the air brake reservoir to be charged
with a common type air hose normally used by service stations and
garages. Charging this system in this manner is only a means of pro-
viding air pressure for the air brake system with an inoperable air
compressor or without cranking the engine and should only be used
for moving the coach while servicing or in case of emergency.
MGM SERVICE AND PARKING BRAKE
Releasing Spring Brake Manually: If air pressure fails in the piston chamber, the power spring applies
the brakes and, unless pressure can be re-established, the service brakes must be released as follows in order
to move the coach.
WARNING: Do not release spring brake until coach is secured by wheel chocks or tow vehicle. Failure to
do so may result in bodily injury or property damage.
Remove the release stud tool and
nut from the carrying pocket on the
brake chamber assembly. Remove the
access plug from the end of the spring
chamber. Insert the release stud
through the opening in the chamber
and into the spring pressure plate.
Turn the release stud one-fourth (1/
4) turn to engage the stud tangs with
the slot in the pressure plate. Keep the
stud engaged and install the nut on
the release stud. Tighten the nut until
the spring is fully caged and the
brakes are released. Do not loosen or
remove the release stud and nut un-
less the brake chamber is completely
assembled and is securely clamped.
When air pressure is restored, remove
the release stud and install in carry-
ing pocket.
BRAKE
RELEASE
CARRYING
POCKET
77
SHRADER VALVE
Shrader Valve
RELEASE
STUD TOOL
NUT
TANGS
PARKING BRAKE
BW
Tank
SPRING
CHAMBER
RELEASE
STUD
NUT